Double-Pass L-band EDFA Through C-band Signal Injection
| Autor: | Pi-Jen Tsai, 蔡弼任 |
|---|---|
| Rok vydání: | 2006 |
| Druh dokumentu: | 學位論文 ; thesis |
| Popis: | 94 In this thesis, we investigate the amplification characteristics of L-band (1570 nm ~ 1610 nm) erbium-doped fiber amplifier (EDFA) by employing the 980 nm forward pumping configuration. In recent years, double-pass long wavelength band EDFAs are attractive. A new double-pass L-band EDFA with enhanced noise figure (NF) and gain characteristics is demonstrated by injecting C-band signal in front of a double-pass amplifier. We use an optical reflector to reroute the optical signals back to the same piece of EDF so as to amplify the optical signals twice. Then, we adjusted the length of erbium-doped fiber (EDF) and the power of pump laser to achieve the flat amplification characteristics in the 1570 nm ~ 1610 nm wavelength region without using gain equalizers. With an injection of -10 dBm at 1550 nm, 5.9 dB of gain enhancement for -30 dBm input at 1600 nm was achieved. The new double-pass system has demonstrated to achieve a flat-gain output at about 45 dB, and a NF of about 4.5 dB in this region. We used simulation tools to investigate the characteristics of L-band EDFA with the same configuration. The NF of proposed L-band EDFA is 5.22 dB, and the gain is 39.40 dB. The simulated results are similar with the experimental results. |
| Databáze: | Networked Digital Library of Theses & Dissertations |
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